Hi Leonard, re: Z = 1, that's just the most natural way that things work out...

For example, here is an array with
Number in X = 3
Number in Y = 3
Number in Z = 3



So as you can see, 27 total items (3 * 3 * 3).

Now going down one step and reducing Number in Z = 2 results in this:



So there it has 18 total items (3 * 3 * 2).

So then following along, reducing to Number in Z = 1, results in this:



So that's 9 total items (3 * 3 * 1).


That's why having only a single layer in z (the default when you start up the command) means having Number in Z = 1.

If it instead had Z = 0 as the default, then it would be kind of strange, since intuitively you would think increasing the Z amount by 1 would result in more items in Z. But you can see from the above progression that the result for Number in Z = 1 should be one layer so that all of X, Y, and Z behave the same.

- Michael